So after aplying the NFE patch the Rontgen works fine on Kerbin but after hyperediting it to Duna it flameouts instantly. The engine tab just says "Air combustion failed" despite having IntakeAtm on board, at least according to the resources tab. I have quite a few mods installed so im not even sure where to look for the cause. Could it be Kopernicus that is somehow responsible for that?
Weirdly enough same thing happens on Laythe so it's not even about oxygen.